If a window of opportunity appears, don't pull down the shade.

I have the simplest tastes. I am always satisfied with the best.

Millions saw the apple fall, but Newton was the one who asked why.

A wise man can learn more from a foolish question than a fool can learn from a wise answer.

People are not disturbed by things, but by the view they take of them.

Doubt grows with knowledge.

Perplexity is the beginning of knowledge.

He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors.

Never stop learning; knowledge doubles every fourteen months.

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.